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What is this motor tag telling me?

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  • What is this motor tag telling me?

    The tag on the motor has low voltage, high voltage, single voltages???? The the ID tag say 3 phase. It's not both 3 phase and single? I've never heard of such a thing?
    Thoughts? Is the 2nd pic just a sticker they use on all motors?
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  • #2
    3 phase
    low is 230v
    high is 460v
    DZER

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    • #3
      3 phase. My Baldor 7.5 h.p. 3 phase has that same note on the inside of the electrical connection cover. Ignore the stated, "Use a manual momentary start switch only". You can go to the Baldor website and download a pdf file with everything you could want to know about that particular motor.

      Dan
      Salem, Oregon

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      • #4
        Single voltage means the leads aren’t brought out to selectively wire for dual voltage.

        Might be HI or LO but not both. Plate says dual, so ignore that part of sticker.

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        • #5
          Thanks. I stopped last night at putting this motor into my K&T. After second guessing myself 20 to 30 times I decided to ask here.

          Again thank you for helping.

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          • #6
            I would assume that the higher voltage is for star connections and the lower is for delta connections. If the delta connections are used, then a cheaper VFD could be used with it.

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            • #7
              Hi Guys,

              Quite simply it is a dual voltage motor, it can be used on either voltage by altering the links on the connecting block. But not both voltages at the same time.
              As Old Mart said ideal candidate for a VFD.

              That second picture show the required connections on the terminal block for the two voltages.

              Best Regards:
              Baron J

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              • #8
                What it means is they were too CHEAP to print two wiring labels. So they made just one for two kinds of motors.

                Hopefully the buyers benefited from their frugality, but I wouldn't bet on it.

                I would bet that wiring label was used on more than just two motor models.
                Paul A.
                SE Texas

                And if you look REAL close at an analog signal,
                You will find that it has discrete steps.

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                • #9
                  That is a Y connected motor at both high and low voltages. It is a 9 lead motor so there is an internal Y connection of 3 coils and the remaining 6 leads are the ends of 3 coils so you can connect in series with internal Y or parallel a second Y with the first.

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                  • #10
                    That motor is 10 hp, it must be a big K & T mill you have.

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                    • #11
                      Old Mart : It is. It is now installed, wired, and tested. It is alive. Now I have to get some belts. 4 of them. I did fix the pulley and it is balanced too. I still need to clean out its new home in the shop. I am thinking about were I'll need access once it is on the concrete. I don't want to ever move it again.

                      I'll get some photos soon.

                      Keith Rucker (youtube) has a K&T now. His is a swing table.

                      In the last 3 months it has been really crazy. I ended up building a motor for my kid's Mini Cooper (lot of shop time) and I picked up a Case 580C to do some yard work. Both are now running but it now getting dark out in the country after 4:30 so I am getting some shop time back.

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                      • #12
                        Originally posted by old mart View Post
                        I would assume that the higher voltage is for star connections and the lower is for delta connections. If the delta connections are used, then a cheaper VFD could be used with it.
                        by cheaper vfd you mean 3x230v? (or is it 3x110v over there?)

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                        • #13
                          In the States we have three wires. 2 lines and a ground. Line to Line is 220-240, Line to ground is 110-120.

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                          • #14
                            Originally posted by outlawspeeder View Post
                            In the States we have three wires. 2 lines and a ground. Line to Line is 220-240, Line to ground is 110-120.
                            Not to be picky, OK I am being picky, but to make things clear to those that are not familiar with various electrical systems....

                            In the US there are actually several standard electric systems. The one you mentioned above is the most common SINGLE PHASE system used. There are also 208 volt single phase, 277 volt single phase, 208, 230 and 480 volt three phase. Some of these systems are combined for various reasons. IE: 277 single phase is included in the 480 three phase wye system. I know I am being very picky, but for people to have an understanding they need to know some of the basic differences so they can do research if they want to know more... Not trying to start a fight, just more info 🙂.
                            Robin

                            Happily working on my second million Gave up on the first

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                            • #15
                              Originally posted by outlawspeeder View Post
                              In the States we have three wires. 2 lines and a ground. Line to Line is 220-240, Line to ground is 110-120.
                              Single phase is as above 2 hot wires and a Neutral wire which is grounded... but not an equipment ground.. His motor which has already been IDed is a 3 phase one. Single phase motors do not need a Neutral.
                              Retired - Journeyman Refrigeration Pipefitter - Master Electrician

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